This article describes experiments of IT-supported cooperation in AEC pedagogical context. The Digital Cooperative Studio (SDC) places students in a situation of distant design cooperation. This experiment allows students to be confronted to a cross-disciplinary approach of the architectural design and leads to the analysis of their own cooperation processes. Two editions of the Digital Cooperative Studio have been carried out in 2007-2008 and 2008-2009. This article presents the lessons learnt from these two experiments.